| 多普勒天气雷达合成切变算法及改进方法的研究 |
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| 引用本文： | 魏耀,张兴敢.多普勒天气雷达合成切变算法及改进方法的研究[J].电子与信息学报,2010,32(1):43-47. |
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| 作者姓名： | 魏耀 张兴敢 |
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| 作者单位： | 南京大学电子科学与工程系,210093,南京;毫米波国家重点实验室,210096,南京 |
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| 摘 要： | 该文在研究由多普勒天气雷达速度场计算合成切变所采用的直接计算差值滤波算法的基础上，针对其存在的边缘点的切变识别较少等问题，结合最小二乘法在线性拟合方面的优势以及雷达数据沿径向分布的特点，提出一种基于取不同拟合窗口的最小二乘法的算法，并利用计算定位精度等方法比较和分析这两种算法，最小二乘法算法在定位精度、识别能力、边缘切变识别等方面优于直接计算差值滤波算法。在2008年北京奥运气象保障中应用最小二乘法的合成切变气象产品给人工影响天气提供了重要参考资料。
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| 关 键 词： | 天气雷达 合成切变 最小二乘法 拟合窗口 人工影响天气 |
| 收稿时间： | 2009-1-7 |
| 修稿时间： | 2009-9-18 |
Research and Improve on a Method of Radial Velocity Azimuth Composite Shear Using Doppler Weather Radar |
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| Wei Yao,Zhang Xing-gan.Research and Improve on a Method of Radial Velocity Azimuth Composite Shear Using Doppler Weather Radar[J].Journal of Electronics & Information Technology,2010,32(1):43-47. |
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| Authors: | Wei Yao Zhang Xing-gan |
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| Affiliation: | Department of Electronic and Engineering, Nanjing University, Nanjing 210093, China; Key Laboratory of Millimeter Wave, Nanjing 210096, China |
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| Abstract: | Based on the research of a differential filtering method retrieving composite shear from Doppler radar velocity data, considering the problems of this method, such as the number of edge detection points is too small, combined with the least square's advantage on Linear fitting and radar data's radial distribution character, this paper presents a method of least squares based on different fitting window. These two methods are compared and analyzed by using computing positioning accuracy method and so on. The... |
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| Keywords: | Weather radar Radial velocity azimuth composite shear Least squares Fitting window Weather modification |
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